Thanks for playing! Really appreciate you taking the time to write such an amazingly detailed feedback!
I will definitely make sure to look into the problems you've enumerated as they are to me important problems to make the game feel better. As for the content, I will be adding more enemies, weapons & maps for the gameplay to be more interesting, as well as improving the current ones which were not complete because of the time constraint.
Thanks again for the detailed feedback, it will help a lot to improve the game! ^^